TY - JOUR T1 - Documenta Ophthalmologica Proceedings JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 852 LP - 852 DO - 10.1136/bjo.63.12.852-a VL - 63 IS - 12 AU - Roger Coakes Y1 - 1979/12/01 UR - http://bjo.bmj.com/content/63/12/852.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -